0 to learn something in such a way that you can say it from memory
1 learned in such a way that you can repeat it from memory:
My father can still recite the poems he learned by heart at school.
2 exactly and from your memory:
She baked muffins from recipes she knew by heart.
NYA ORD
European
May 10, 2021
DAGENS ORD
Shimmer
by-heart